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LibC: Ensure most time tests run under UTC

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This ensures these tests pass even if the user has changed the system
time zone away from UTC.
This commit is contained in:
Timothy Flynn
2022-01-24 15:38:33 -05:00
committed by Linus Groh
parent 024f869f09
commit 010ec36d20
1 changed files with 14 additions and 0 deletions
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14
Tests/LibC/TestLibCTime.cpp
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@@ -17,6 +17,12 @@ public:
{ {
} }
explicit TimeZoneGuard(char const* tz)
: m_tz(getenv("TZ"))
{
setenv("TZ", tz, 1);
}
~TimeZoneGuard() ~TimeZoneGuard()
{ {
if (m_tz) if (m_tz)
@@ -31,6 +37,8 @@ private:
TEST_CASE(asctime) TEST_CASE(asctime)
{ {
TimeZoneGuard guard("UTC");
time_t epoch = 0; time_t epoch = 0;
auto result = asctime(localtime(&epoch)); auto result = asctime(localtime(&epoch));
EXPECT_EQ(expected_epoch, StringView(result)); EXPECT_EQ(expected_epoch, StringView(result));
@@ -38,6 +46,8 @@ TEST_CASE(asctime)
TEST_CASE(asctime_r) TEST_CASE(asctime_r)
{ {
TimeZoneGuard guard("UTC");
char buffer[26] {}; char buffer[26] {};
time_t epoch = 0; time_t epoch = 0;
auto result = asctime_r(localtime(&epoch), buffer); auto result = asctime_r(localtime(&epoch), buffer);
@@ -46,6 +56,8 @@ TEST_CASE(asctime_r)
TEST_CASE(ctime) TEST_CASE(ctime)
{ {
TimeZoneGuard guard("UTC");
time_t epoch = 0; time_t epoch = 0;
auto result = ctime(&epoch); auto result = ctime(&epoch);
@@ -54,6 +66,8 @@ TEST_CASE(ctime)
TEST_CASE(ctime_r) TEST_CASE(ctime_r)
{ {
TimeZoneGuard guard("UTC");
char buffer[26] {}; char buffer[26] {};
time_t epoch = 0; time_t epoch = 0;
auto result = ctime_r(&epoch, buffer); auto result = ctime_r(&epoch, buffer);